TEK IMAGE / SCIENCE PHOTO LIBRARY TEK IMAGE / SCIENCE PHOTO LIBRARY
Computer mouse & keyboard. View of a computer mouse and a keyboard (top). A computer mouse contains a small rubber ball that spins as the mouse slides over a flat surface. Electronic detectors pick up the ball's movements and translate them into corresponding movements of a pointer or other icon on a computer screen. The mouse makes it possible to use computer programs without entering complex codes via the keyboard.
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